/* Username Modal - Enhanced Design */
.username-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 1;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.username-modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.8);
}

.username-modal {
    background: linear-gradient(135deg, 
        rgba(26, 26, 26, 0.95) 0%, 
        rgba(42, 42, 42, 0.95) 50%,
        rgba(26, 26, 26, 0.95) 100%);
    border-radius: 20px;
    padding: 0;
    max-width: 450px;
    width: 90%;
    border: 3px solid rgba(0, 255, 0, 0.4);
    box-shadow: 
        0 0 50px rgba(0, 255, 0, 0.4),
        0 0 100px rgba(0, 255, 0, 0.2),
        0 25px 50px rgba(0, 0, 0, 0.6);
    transform: scale(1) translateY(0);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.username-modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 255, 0, 0.8) 50%, 
        transparent 100%);
    animation: modalGlow 3s ease-in-out infinite alternate;
}

@keyframes modalGlow {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

.username-header {
    padding: 30px 30px 20px;
    border-bottom: 1px solid rgba(0, 255, 0, 0.3);
    position: relative;
}

.username-header h3 {
    color: #E8F4F8;
    font-size: 22px;
    font-weight: 600;
    margin: 0;
    text-align: center;
    text-shadow: 
        0 0 15px rgba(232, 244, 248, 0.6),
        0 0 30px rgba(0, 255, 0, 0.3);
    letter-spacing: 1px;
}

.username-body {
    padding: 30px;
}

.username-body input {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid rgba(0, 255, 0, 0.3);
    border-radius: 12px;
    padding: 16px 20px;
    color: #E8F4F8;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 16px;
    font-weight: 500;
    outline: none;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 
        inset 0 0 20px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(0, 255, 0, 0.1);
}

.username-body input:focus {
    border-color: rgba(0, 255, 0, 0.7);
    box-shadow: 
        inset 0 0 20px rgba(0, 0, 0, 0.3),
        0 0 25px rgba(0, 255, 0, 0.3),
        0 0 50px rgba(0, 255, 0, 0.1);
    transform: translateY(-2px);
}

.username-body input::placeholder {
    color: #B8D4D8;
    opacity: 0.6;
    font-weight: 400;
}

.username-footer {
    text-align: center;
}

.save-username-btn {
    background: linear-gradient(135deg, 
        rgba(0, 255, 0, 0.9) 0%, 
        rgba(0, 200, 0, 1) 50%,
        rgba(0, 255, 0, 0.9) 100%);
    border: none;
    color: #000;
    padding: 16px 32px;
    border-radius: 12px;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 
        0 0 25px rgba(0, 255, 0, 0.4),
        0 8px 20px rgba(0, 0, 0, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.save-username-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.3), 
        transparent);
    transition: left 0.5s ease;
}

.save-username-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 
        0 0 35px rgba(0, 255, 0, 0.6),
        0 12px 25px rgba(0, 0, 0, 0.4);
}

.save-username-btn:hover:not(:disabled)::before {
    left: 100%;
}

.save-username-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.2);
}

/* Verification Code Display */
.verification-display {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.verification-btn {
    background: linear-gradient(135deg, rgba(0, 255, 0, 0.1) 0%, rgba(0, 200, 0, 0.2) 100%);
    border: 1px solid rgba(0, 255, 0, 0.3);
    border-radius: 8px;
    padding: 6px 12px;
    color: #B8D4D8;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px rgba(0, 255, 0, 0.1);
}

.verification-btn:hover {
    background: linear-gradient(135deg, rgba(0, 255, 0, 0.2) 0%, rgba(0, 200, 0, 0.3) 100%);
    border-color: rgba(0, 255, 0, 0.5);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.2);
    transform: translateY(-1px);
}

.verification-code {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 255, 0, 0.4);
    border-radius: 6px;
    padding: 8px;
    margin-top: 6px;
    color: #00ff00;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 9px;
    font-weight: 600;
    text-align: center;
    word-break: break-all;
    box-shadow: 0 0 8px rgba(0, 255, 0, 0.2);
    text-shadow: 0 0 3px rgba(0, 255, 0, 0.6);
}

.verification-code.hidden {
    display: none;
}

/* Mobile responsiveness for username modal */
@media (max-width: 768px) {
    .username-modal {
        width: 95%;
        max-width: 380px;
        border-radius: 16px;
    }
    
    .username-header {
        padding: 25px 25px 15px;
    }
    
    .username-header h3 {
        font-size: 20px;
    }
    
    .username-body {
        padding: 25px;
    }
    
    .username-body input {
        padding: 14px 18px;
        font-size: 15px;
    }
    
    .save-username-btn {
        padding: 14px 28px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .username-modal {
        width: 98%;
        max-width: 320px;
        border-radius: 12px;
    }
    
    .username-header {
        padding: 20px 20px 12px;
    }
    
    .username-header h3 {
        font-size: 18px;
    }
    
    .username-body {
        padding: 20px;
    }
    
    .username-body input {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .save-username-btn {
        padding: 12px 24px;
        font-size: 14px;
    }
}